Related Clues:

• Number clever enough for game show
• Credible number left in Lincoln?
• All but one in side fit and sound?
• Like a solid theory
• Sound; justifiable
• Number with clever sound
• Defensible against objection
• Holding it together after upset is what fellow’s about
• He stops disparate voices coming together
• Well-integrated chap comprehends kernel of thesis
• Set to secure arrest? That’s credible
• Logical bloke, he's one to be welcomed
• Based on sound reason
• Fit to be maintained, believed or defended